This chapter discusses financing of the US healthcare system. It notes that healthcare spending has increased annually since 1960 and now accounts for nearly 18% of GDP. Funding comes from various sources including private insurance (34%), out-of-pocket payments (13%), and government programs like Medicare and Medicaid (49%). Medicare provides coverage for those over 65 and some disabled individuals, while Medicaid covers some poor populations. The money spent goes primarily towards personal healthcare services like hospital and physician care. Payment methods include fee-for-service, capitation, and value-based models. Despite high spending, over 50 million Americans still lack health insurance coverage.